Wydanie 334(42)2 2017

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https://oa.zut.edu.pl/handle/20.500.12539/704

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Przeglądaj Wydanie 334(42)2 2017 wg Autor "Czerniawska-Piątkowska, Ewa"

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  • Miniatura
    PozycjaOpen Access
    The effect of selected factors on freshening milking efficiency in primiparous polish holstein-friesian black-and-white cows
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2017) Pytlewski, Jarosław; Antkowiak, Ireneusz R.; Stanisławski, Daniel; Czerniawska-Piątkowska, Ewa; Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences; Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences; Computer Lab, Poznań University of Life Sciences; Department of Ruminant Science, West Pomeranian University of Technology
    Sire origin as well as age and body weight of heifers at fertilization were shown to have a statistically significant effect on freshening milking efficiency in Polish Holstein-Friesian Black- -and-White primiparous cows. The highest milk yields during the freshening stage were recorded for daughters of bulls from North America and primiparous cows, which were fertilized as heifers aged 16 months and at body weight 475 kg. Most probably the high genetic potential of HF cattle from North America, exceeding European cattle in terms of milk yield, was connected with the longer period of their upgrading and in combination with the improvement of local production conditions ensured the most advantageous results. It seems that milk yield in the freshening period is affected by body weight and development of heifers rather than their age at fertilization. In order to reduce the rearing stage in young females it is recommended in that period to apply more intensive nutrition.
  • Miniatura
    PozycjaOpen Access
    The polymorphism C9681T in the prolactin receptor gene and functional traits of dairy cattle
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2017) Kowalewska-Łuczak, Inga; Czerniawska-Piątkowska, Ewa; Department of Genetics and Animal Breeding, West Pomeranian University of Technology, Szczecin; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin
    The study analyzed the polymorphism of single nucleotide substitution C9681T (A536V) type, located in exon 10 of prolactin receptor gene. The study was conducted in a herd of cattle of Polish Holstein-Friesian breed of black and white variety. Identification of genotypes of individuals was performed using PCR-RFLP. The study stated the following frequency of C9681T polymorphism alleles: C-0.81 and T- 0.19. TT genotype was not identified in the analysis. Statistical analysis showed that the CC genotype cows were characterized by higher milk yield as compared with cows with the heterozygous genotype, and the latter were characterized by a longer calving interval. The results were not confirmed statistically.
  • Miniatura
    PozycjaOpen Access
    The use of genetic markers in the fight against mastitis
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2017) Czerniawska-Piątkowska, Ewa; Lukomska, Joanna; Bortacki, Paweł; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin; Sano-Modern Animal Nutrition Limited Company, Sękowo
    The purpose of the paper was to characterize mastitis, present different methods of treatment and prevention of emergence of mastits. Conventional methods include hygiene during milking and after it, the cleanliness in the barn, the use of vaccines and antibiotic therapy. Traditional methods have proven to be too time consuming and costly, therefore, one has started research on genes that may be responsible for mastitis. The MAS method uses genetic markers to select animals with higher resistance to mastitis. This technique is designed not only to improve the health of cows, but also to increase productivity of milk, which is important for the breeding aspects. Lactoferrin and BoLA gene were presented as candidate genes for genetic markers against mastitis, due to their bacteriostatic properties.